A Childhood iMovie is that one really shitty iMovie you made with your cousins or siblings and friends when you were younger and pure, innocent and not Dirty Minded. You showed it to you parents so proudly despite it being the worst movie to ever grace the world. Tho you thought it was Hollywood worthy.
Girl 1: “Aww, remember those cute little Childhood iMovies that we all used to make when we were kids?”
Girl 2: “Omg girl, I remember how bad they were lol.”